diff options
Diffstat (limited to 'rust/coverage.go')
| -rw-r--r-- | rust/coverage.go | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/rust/coverage.go b/rust/coverage.go index 050b811c7..8fdfa2342 100644 --- a/rust/coverage.go +++ b/rust/coverage.go @@ -57,7 +57,18 @@ func (cov *coverage) flags(ctx ModuleContext, flags Flags, deps PathDeps) (Flags flags.RustFlags = append(flags.RustFlags, "-Z instrument-coverage", "-g") flags.LinkFlags = append(flags.LinkFlags, - profileInstrFlag, "-g", coverage.OutputFile().Path().String(), "-Wl,--wrap,open") + profileInstrFlag, "-g", coverage.OutputFile().Path().String(), "-Wl,--wrap,open", + // Upstream LLVM change 6d2d3bd0a6 made + // -z,start-stop-gc the default. It drops metadata + // sections like __llvm_prf_data unless they are marked + // SHF_GNU_RETAIN. https://reviews.llvm.org/D97448 + // marks generated sections, including __llvm_prf_data + // as SHF_GNU_RETAIN. However this change is not in + // the Rust toolchain. Since we link Rust libs with + // new lld, we should use nostart-stop-gc until the + // Rust toolchain updates past D97448. + "-Wl,-z,nostart-stop-gc", + ) deps.StaticLibs = append(deps.StaticLibs, coverage.OutputFile().Path()) } |